How to recover a usb which was made bootable using dd tool [duplicate]

Solution 1:

You need to remove the image of the install disk completely. Run the following series of commands:

sudo fdisk /dev/sd_ # Insert drive letter as appropriate
    p         # This will list partitions on it. CHECK it's the pendrive!
    d         # Delete partition (repeat until all deleted).
    p         # If you still have partitions, run d again
    n         # Create a new partition. Physical, accept defaults for size etc
    t         # Change type - use option b (vfat). Consider c (bigger USB sticks).
    w         # Write out changes & quit fdisk

sudo mkfs -t vfat /dev/sd_1